Average profit = \(\frac { Total\quad profit }{ Number\quad ofyear } \)
= \(\frac { 40,000+50,000+48,000+46,000 }{ 4 } \)
= \(\frac { 1,84,000 }{ 4 } \)
= Rs. 46,000

Goodwill = Average profit \(\times\) Number of years of purchase
= 40,000 \(\times\) 3 = Rs. 1,20,000

i) When there is a change in the profit Sharing ratio.
ii) When a new partner is admitted into a firm.
iii) When an existing partner retires from the firm or when a partner dies.
iv) When a partnership firm is dissolved.

Super profit is the excess of average profit over the normal profit. Average profit is calculated by dividing the total adjusted actual profit of certain number of years by the total number of such years. Normal profit is the profit earned by the similar business, firms under normal conditions.
Normal profit = Capital employed \(\times\) Normal rate of return.
Capital employed = Fixed assets + Current assets - Current liabilities.

Goodwill is the good name or reputation of the business which brings benefit to the business. It enables the business to earn more profit. It is the present value of a firm's future excess earnings. It is an intangible asset as it has no physical existence.

Goodwill = Average profit \(\times\) Number of years of purchase
Average profit \(=\frac{Total\ profit}{Number\ of\ years}\)
\(\frac{10,000+11,000+12,000+13,000+14,000}{5}\)
\(=\frac{60,000}{5}\) = Rs. 12,000
Average profit = Rs. 12,000
Goodwill Average profit \(\times\) Number of years of purchase
12,000 \(\times\) 2 = 24,000
Goodwill = Rs. 24,000